Coil receptacle for electromagnetically operated valves



1942- w. A. RAY 2,303,066

COIL RECEPTAGLE FOR ELECTROMAGNETICALLY OPERATED VALVE Filed NOV. 6,1939 MAL/AMA. QAK I 31 ntor.

Gttorneg Patented Nov. 24, 1942 COIL RECEPTACLE FOR ELECTROMAGNETI-.CALLY OPERATED VALVES William A. Ray, Glendale, Calif.

Application November 6, 1939, Serial No. 303,093

9 Claims.

My present invention relates to electromagnetically operated fluidcontrol valves and has for an object the provision of means whereby theenergizing coil of the electromagnet is shielded from the fluidcontrolled by the valve..

Another object is the provision of means whereby the coil may be readilyreplaced in the electromagnet.

Another object is the provision, in an electromagnetic operator, of anovel structure wherein the magnetic members may be formed of sheetmetal.

Another object is the provision of a metallic receptacle for the coil,portions of the receptacle being selectively so treated as to renderthem magnetically different from the remaining portion.

Other objects and advantages'of my invention will be found in thedescription, the drawing, and the appended claims.

For complete understanding of the invention,-

reference may be had to the following detailed description andaccompanying drawing, the single figure of which is a sectional viewof-a valve embodying my invention.

In the drawing. the numeral H indicates a valve casing having an inleti2-and an outlet i3 separated by a ported partition i4 provided with anannular valve seat i5. Cooperable with said seat is a valve member i6,of magnetic material,

provided with a guide member I! having vanes I I.

An upper extension IQ of the casing provides an opening for thereception of an electromagnet comprising an outer cylindrical coremember 20 having a laterally extending marginal flange 2i. A covermember 22, of magnetic material, for the outer core carries on itsunderside an inner concentric inverted cup-shaped core 23.

A trough-shaped receptacle 24, having a marginal center portion 26 and amarginal outer flange portion 21, is provided for a coil 25. Thisreceptacle is disposed between the cores with the center portion 26interposed between the inner core 23 and the cover member 22, and theflange portion 21 between the flange 2i of the outer core and the covermember.

The receptacle 24 is preferably formed from a single piece ofnon-magnetic sheet material, such as an iron alloy containingapproximately 18 per cent of chromium and 8 per cent of nickel. Thisalloy, commonly known as 18-8 Stainless Steel, is normally relativelynon-magnetic, but by suitable heat treatment may be rendered magnetic. Ipreferably selectively so treat only the portions 26 and 21 so thattheir reluctance is reduced, a more efficient magnetic circuit thusbeing provided.

It will be seen that the member 24 effectively shields the coil from thefluid controlled by the valve and facilitates replacement of the coil.

The electromagnet is secured together and to the valve casing by screws28; terminals 29, insultatingly mounted in the cover member, beingprovided for the external connection of a source 'of current to thecoil.

The bottom faces of the cores, cooperable with the magnetic valve memberI6, are arranged in a single plane by accurate machining and lapping.The magnetic members it. 20, 22 and 23 are preferably of an iron alloy,having a high nickel content, which has high permeability and issuitable for punch-press forming. The electromag net is especiallyadapted for sensitive operation on direct current.

While I have herein shown and described a specific embodiment of myinvention, I wish it to be understood that modifications may be madewithout departing from the spirit of my invention. I intend, therefore,that my invention be limited only by the scope of the appended claims.

I claim as my invention:

1. The combination, with a fluid control valve casing having an openingin the upper wall thereof, of an electromagnet comprising a hollow coil,a continuous trough-shaped receptacle for said coll formedof sheetmaterial and having 9. marginal center portion and a marginal outerflange, and means for sealingly mounting said receptacle in said openingby the aid of said flange so that the trough extends within said casingand is exposed to the fluid controlled by the valve.

2. The combination, with a fluid control valve casing having an openingin the upper wall thereof, of an electromagnet comprising'a hollow coil,9. continuous trough-shaped receptacle for said coil formed of sheetmaterial and having a marginal center portion and a marginal outerflange, and means for sealingly mounting said flange on the surface ofsaid casing surrounding said opening so that the trough extends withinsaid casing and is exposed to the fluid controlled by the valve.

3. The combination, with a fluid control valve casing having an openingin the upper wall thereof, of an electromagnet comprising a hollowcylindrical coil, an annular trough-shaped receptacle for said coilformed of sheet material and having a marginal center portion and amarginal outer flange, and means for sealingly mounting said receptaclein said opening by the aid of said receptacle said opening by the aid ofsaid flange so that the core and the receptacle extend within saidcasing and are exposed to the fluid controlled by the valve, said flangebeing adapted to overlie the surface of said casing SUI- rounding saidopening.

' 5. In combination, a hollow coil member, a continuous trough-shapedreceptacle for said 0011 formed of sheet material and having a marginalcenter portion and an integrally formed marginal laterally extendingouter flange in the same plane as said center portion, and a closuremember for said receptacle mounted on said flange and on said centerportion.

6. In combination, a hollow coil member, a continuous trough-shapedreceptacle for said coil formed of sheet metal and having a marginalcenter portion and a marginal laterally extending cuter flange, and aclosure member of magnetic material for said receptacle and mounted onsaid flange. said sheet metal normally having relatively non-magneticproperties, the flange of said reccptacle being so treated as to renderthat porlion magnetic. the flange portion and the closure membertogether serving as a. unitary conductor for the flux produced thereinby current flow in said coil.

'7. The combination, with a fluid control valve casing havin an openingin the upper Wall thereof. of an electromagnetic operator comprising ahollow cylindrical outer core receivable in said opening and having anupper outwardly turned flange for engagement with the outer surface ofsaid casing, a cover member of magnetic material for said core, acylindrical inner core concentrically mounted on the underside of saidcover member, the inner ends of said cores terminating in a singleplane, an annular trough-shaped coil escapee receptacle :io tween or amarginal cent flange portion, said cc posed between the upper sui coresaid cover memb tion being" interposed between of the flange of saidouter core and s member, a coil in said receptacle, an tively flatannature member coopcrab "-it; inner ends of said core.

8. In a fluid control valve, a casing having an inlet and an outlet, apartition separating r "d, inlet and said outlet and provided with. vs,port, the upper wall of said casing having an opening axially alignedwith said port, a hollow cylindrical outer core receivable in saidopening and having an upper outwardly turned flange {or engagement withthe outer surface of said casing. a cover member of magnetic materialfor said 7 core, an inverted cup-shaped inner core concentricallymounted on the underside of said cover member, the bottom ends of saidcores tenninating in a single plane, an annular trouglushaped coilreceptacle formed of sheet material disposed between said outer and saidinner core and having a marginal center portion and a marginal outerflange portion, said center portion being in terposed between the uppersurface oi said inner core and said cover member and said flange portion being interposed between the flange of said outer core and saidcover member, a coil in said receptacle, and a valve member cooperablewith said port and comprising a relatively flat armature cooperable withthe bottom ends 01' said cores.

9. In combination, a hollow coil member, a continuous trough-shapedreceptacle for So.. T l formed of sheet metal and center portion and amarginal outer flange, said sheet mete. relatively non-rnagnetic prosaid receptacle being so treated to portion magnetic, a closure member.of! magnetic material for said receptacle and mounted on said flange,and a core member also of magnetic runterial and mounted on the side ofsaid flange op posite to that whereon the closure member mounted.

WILLIAM A, RAY.

